Pair of thumb support stays



FIG. 1 is a perspective view of a pair of thumb support stays; and,

FIG. 2 is a top view thereof.

The broken lines illustrate environmental structure and form no part of the claimed design.

The broken lines adjoining the claimed design illustrate boundary lines and form no part of the claimed design. 

The ornamental design for a pair of thumb support stays, as shown and described. 